mysteriousness vs mysticism

mysteriousness

noun
  • The quality of being mysterious. 

mysticism

noun
  • The beliefs, ideas, or thoughts of mystics. 

  • A transcendental union of soul or mind with the divine reality or divinity. 

  • A doctrine of direct communication or spiritual intuition of divine truth. 

  • Obscure thoughts and speculations. 

How often have the words mysteriousness and mysticism occurred in a corpus of books? (source: Google Ngram Viewer )